Aldehyde (CHO) — picos de absorción FTIR y asignaciones

Respuesta rápida

Aldehyde (CHO) se asigna generalmente buscando un grupo recurrente de picos característicos en lugar de un número exacto de libro de texto. La siguiente tabla muestra dónde la literatura coloca con mayor frecuencia este grupo en FTIR, clasificado por evidencia acumulada.

Picos FTIR característicos para Aldehyde (CHO)

Mostrando los 30 picos mejor respaldados de 118 totales para Aldehyde (CHO).

Lógica de espectro

Una asignación de grupo funcional se vuelve más confiable cuando varias bandas esperadas aparecen juntas. Use esta página para encontrar los picos con mayor soporte, luego confirme que la misma muestra exhibe un patrón coherente en lugar de un solo acierto aislado.

Uso en el mundo real

Estas páginas son útiles para el análisis de materiales desconocidos, la explicación de picos en informes, la resolución de problemas de polímeros y la verificación de si una familia de materiales candidata es químicamente plausible.

Errores comunes

• Usar una página de grupo funcional como veredicto completo del material sin verificar el resto del espectro.
• Asumiendo que la banda más fuerte es siempre la más diagnóstica.
• Olvidar que el procesamiento, los aditivos, el envejecimiento y las mezclas pueden desplazar o ensanchar los picos esperados.

Consejo de verificación

Utilice DSC, GC-MS o TGA cuando varias familias de materiales compartan bandas similares o cuando los efectos de mezcla hagan incierta la asignación de FTIR.

Literatura detrás de estas asignaciones

• 1745 cm⁻¹ confianza 1,0

  “cm(cid:3)1 1747cm(cid:3)1 1745cm(cid:3)1 peak at 1745 on both spectra exhibited similar intensity for which showed stronger than that at of C4 cm(cid:3)1 the content of aldehydes, ketones and carbonyl stretching vibrain intensity.”

  Determination of chemical changes in Isatis indigotica seeds carried after Chinese first spaceship with FTIR and 2D-IR correlation spectroscopy DOI: 10.1016/j.saa.2014.01.048
• 1730 cm⁻¹ confianza 1,0

  “appearance of carboxylic acid and aldehyde peaks at 1730 and 3.1.”

  FTIR monitoring of oxazolidin-5-one formation and decomposition in a glycolaldehyde–phenylalanine model system by isotope labeling techniques DOI: 10.1016/j.carres.2008.10.011
• 1020 cm⁻¹ confianza 1,0

  “On the other hand, peak 3 cm-1 at 1020 of the TCHO region represents non-structural CHO such as starch [15].”

  Gene-Transformation-Induced Changes in Chemical Functional Group Features and Molecular Structure Conformation in Alfalfa Plants Co-Expressing Lc-bHLH and C1-MYB Transcriptive Flavanoid Regulatory Genes: Effects of Single-Gene and Two-Gene Insertion DOI: 10.3390/ijms18030664
• 900 cm⁻¹ confianza 1,0

  “EXE 9 and CRE + EXE 9), = = = cating bands assigned to the NH stretching vibrations feeding and supplementation protocols, tissue prepacm21) (~3000-3500 and (b) indicating bands assigned ration, and FT-IR spectrometry evaluation were also t”

  Jeronimo 等 - 2012 - Detection of Creatine in Rat Muscle by FTIR Spectr DOI: 10.1007/s10439-012-0549-9
• 1453 cm⁻¹ confianza 1,0

  “The 2928cm-1 peaks positioned at about 1453 and of wavelength were due to the stretching C-H of alkane methyl and aldehyde doublet groups.”

  Biosynthesis of copper oxide nanoparticles and their potential synergistic effect on alloxan induced oxidative stress conditions during cardiac injury in Sprague–Dawley rats DOI: 10.1016/j.jphotobiol.2019.111557
• 1735 cm⁻¹ confianza 1,0

  “Attention should be paid to a cm-1) very important area, which is only slightly marked in our spectra (with a maximum at about 1735 and is due to the stretching vibrations of functional groups such as ketone C = O of fructose and aldehyde C”

  Identification of sugars and phenolic compounds in honey powders with the use of GC–MS, FTIR spectroscopy, and X-ray diffraction DOI: 10.1038/s41598-020-73306-7
• 1750 cm⁻¹ confianza 1,0

  “The bands at 1800-1600 with a cm-1, prominent peak at 1750 were assigned to C=O stretching vibrations of aldehydes and D ketones [29].”

  Coupling pyrolysis with mid-infrared spectroscopy (Py-MIRS) to fingerprint soil organic matter bulk chemistry DOI: 10.1016/j.jaap.2018.04.004
• 1727 cm⁻¹ confianza 1,0

  “In addition, Cya produced a peak at 1727 due to stretching vibration of the cm-1, aldehyde group.”

  Improvement of stability due to a cyclamen aldehyde/β-cyclodextrin inclusion complex DOI: 10.1016/j.molstruc.2020.128161